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Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
Consider two very large primes, P and Q, each a hundred of digits or more in length. Their product is the semi-prime S. Given S, it is extremely difficult to find P or Q. If P and Q are sufficiently large, even very fast computers will take a long time to factorise S.
But, given S and P it is simple to find Q. So if S is used for encryption and P is the key, then anyone who knows P can easily decrypt the message but someone who does not know P will be unable to do so.
What else can I help you with?
Why do you think prime numbers would be more useful for the creation of codes than composite numbers?
Actually it is composite numbers that are used - products of two very large primes.
Why are prime numbers more useful for the creation of codes than composite numbers?
Actually both are important. Public encryption is based on the product (and so a composite) of two very large prime numbers.
Why are prime numbers more useful than composite numbers in cryptography?
This question is based on a misunderstanding. Most cryptography is based on numbers that are products of two very large prime numbers. Being the product of two primes means that these numbers are composite - not prime!
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Codes called when procedures are grouped together are known as composite codes or bundled codes. These codes represent a combination of related procedures that are typically performed together as part of a single service or treatment.
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Build-a-Bearville recepit codes?
what are some cheat codes for recipt numbers for buildabearworkshop.com
